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import colorsys
from itertools import product
from ctypes import c_size_t, c_uint8, c_void_p, c_float, CDLL, Structure, POINTER
import numpy as np
import time
import atexit
import config
ml = CDLL('./libml.so')
ml.matelight_open.restype = c_void_p
if ml.matelight_usb_init():
raise OSError('Cannot initialize USB library')
atexit.register(ml.matelight_usb_destroy)
class Matelight:
def __init__(self, match_serial=None):
""" Open the matelight matching the USB serial number given as a bytes object. If match_serial is None, open the
first matelight """
self.handle = ml.matelight_open(match_serial)
self.dbuf = np.zeros(config.frame_size*4, dtype=np.uint8)
if self.handle is None:
raise ValueError('Cannot find requested matelight.')
def sendframe(self, framedata):
""" Send a frame to the display
The argument contains a h * w array of 3-tuples of (r, g, b)-data or 4-tuples of (r, g, b, a)-data where the a
channel is ignored.
"""
# just use the first Mate Light available
rgba = len(framedata) == config.frame_size*4
np.copyto(self.dbuf[:640*(3+rgba)], np.frombuffer(framedata, dtype=np.uint8))
ml.matelight_send_frame(self.handle, self.dbuf.ctypes.data_as(POINTER(c_uint8)), c_size_t(config.crates_x),
c_size_t(config.crates_y), c_float(config.brightness), rgba)
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